ui/sdl2.c

   1 /*
   2  * QEMU SDL display driver
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 /* Ported SDL 1.2 code to 2.0 by Dave Airlie. */
  25
  26 /* Avoid compiler warning because macro is redefined in SDL_syswm.h. */
  27 #undef WIN32_LEAN_AND_MEAN
  28
  29 #include <SDL.h>
  30
  31 #if SDL_MAJOR_VERSION == 2
  32 #include <SDL_syswm.h>
  33
  34 #include "qemu-common.h"
  35 #include "ui/console.h"
  36 #include "ui/input.h"
  37 #include "sysemu/sysemu.h"
  38 #include "sdl_zoom.h"
  39
  40 #include "sdl2-keymap.h"
  41
  42 static int sdl2_num_outputs;
  43 static struct sdl2_state {
  44     DisplayChangeListener dcl;
  45     DisplaySurface *surface;
  46     SDL_Texture *texture;
  47     SDL_Window *real_window;
  48     SDL_Renderer *real_renderer;
  49     int idx;
  50     int last_vm_running; /* per console for caption reasons */
  51     int x, y;
  52 } *sdl2_console;
  53
  54 static SDL_Surface *guest_sprite_surface;
  55 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  56
  57 static bool gui_saved_scaling;
  58 static int gui_saved_width;
  59 static int gui_saved_height;
  60 static int gui_saved_grab;
  61 static int gui_fullscreen;
  62 static int gui_noframe;
  63 static int gui_key_modifier_pressed;
  64 static int gui_keysym;
  65 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  66 static uint8_t modifiers_state[SDL_NUM_SCANCODES];
  67 static SDL_Cursor *sdl_cursor_normal;
  68 static SDL_Cursor *sdl_cursor_hidden;
  69 static int absolute_enabled;
  70 static int guest_cursor;
  71 static int guest_x, guest_y;
  72 static SDL_Cursor *guest_sprite;
  73 static int scaling_active;
  74 static Notifier mouse_mode_notifier;
  75
  76 static void sdl_update_caption(struct sdl2_state *scon);
  77
  78 static struct sdl2_state *get_scon_from_window(uint32_t window_id)
  79 {
  80     int i;
  81     for (i = 0; i < sdl2_num_outputs; i++) {
  82         if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  83             return &sdl2_console[i];
  84         }
  85     }
  86     return NULL;
  87 }
  88
  89 static void sdl_update(DisplayChangeListener *dcl,
  90                        int x, int y, int w, int h)
  91 {
  92     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
  93     SDL_Rect rect;
  94     DisplaySurface *surf = qemu_console_surface(dcl->con);
  95
  96     if (!surf) {
  97         return;
  98     }
  99     if (!scon->texture) {
 100         return;
 101     }
 102
 103     rect.x = x;
 104     rect.y = y;
 105     rect.w = w;
 106     rect.h = h;
 107
 108     SDL_UpdateTexture(scon->texture, NULL, surface_data(surf),
 109                       surface_stride(surf));
 110     SDL_RenderCopy(scon->real_renderer, scon->texture, &rect, &rect);
 111     SDL_RenderPresent(scon->real_renderer);
 112 }
 113
 114 static void do_sdl_resize(struct sdl2_state *scon, int width, int height,
 115                           int bpp)
 116 {
 117     int flags;
 118
 119     if (scon->real_window && scon->real_renderer) {
 120         if (width && height) {
 121             SDL_RenderSetLogicalSize(scon->real_renderer, width, height);
 122             SDL_SetWindowSize(scon->real_window, width, height);
 123         } else {
 124             SDL_DestroyRenderer(scon->real_renderer);
 125             SDL_DestroyWindow(scon->real_window);
 126             scon->real_renderer = NULL;
 127             scon->real_window = NULL;
 128         }
 129     } else {
 130         if (!width || !height) {
 131             return;
 132         }
 133         flags = 0;
 134         if (gui_fullscreen) {
 135             flags |= SDL_WINDOW_FULLSCREEN;
 136         } else {
 137             flags |= SDL_WINDOW_RESIZABLE;
 138         }
 139
 140         scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
 141                                              SDL_WINDOWPOS_UNDEFINED,
 142                                              width, height, flags);
 143         scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
 144         sdl_update_caption(scon);
 145     }
 146 }
 147
 148 static void sdl_switch(DisplayChangeListener *dcl,
 149                        DisplaySurface *new_surface)
 150 {
 151     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 152     int format = 0;
 153     int idx = scon->idx;
 154     DisplaySurface *old_surface = scon->surface;
 155
 156     /* temporary hack: allows to call sdl_switch to handle scaling changes */
 157     if (new_surface) {
 158         scon->surface = new_surface;
 159     }
 160
 161     if (!new_surface && idx > 0) {
 162         scon->surface = NULL;
 163     }
 164
 165     if (new_surface == NULL) {
 166         do_sdl_resize(scon, 0, 0, 0);
 167     } else {
 168         do_sdl_resize(scon, surface_width(scon->surface),
 169                       surface_height(scon->surface), 0);
 170     }
 171
 172     if (old_surface && scon->texture) {
 173         SDL_DestroyTexture(scon->texture);
 174         scon->texture = NULL;
 175     }
 176
 177     if (new_surface) {
 178         if (!scon->texture) {
 179             if (surface_bits_per_pixel(scon->surface) == 16) {
 180                 format = SDL_PIXELFORMAT_RGB565;
 181             } else if (surface_bits_per_pixel(scon->surface) == 32) {
 182                 format = SDL_PIXELFORMAT_ARGB8888;
 183             }
 184
 185             scon->texture = SDL_CreateTexture(scon->real_renderer, format,
 186                                               SDL_TEXTUREACCESS_STREAMING,
 187                                               surface_width(new_surface),
 188                                               surface_height(new_surface));
 189         }
 190     }
 191 }
 192
 193 static void reset_keys(void)
 194 {
 195     int i;
 196
 197     for (i = 0; i < 256; i++) {
 198         if (modifiers_state[i]) {
 199             int qcode = sdl2_scancode_to_qcode[i];
 200             qemu_input_event_send_key_qcode(NULL, qcode, false);
 201             modifiers_state[i] = 0;
 202         }
 203     }
 204 }
 205
 206 static void sdl_process_key(SDL_KeyboardEvent *ev)
 207 {
 208     int qcode = sdl2_scancode_to_qcode[ev->keysym.scancode];
 209
 210     switch (ev->keysym.scancode) {
 211 #if 0
 212     case SDL_SCANCODE_NUMLOCKCLEAR:
 213     case SDL_SCANCODE_CAPSLOCK:
 214         /* SDL does not send the key up event, so we generate it */
 215         qemu_input_event_send_key_qcode(NULL, qcode, true);
 216         qemu_input_event_send_key_qcode(NULL, qcode, false);
 217         return;
 218 #endif
 219     case SDL_SCANCODE_LCTRL:
 220     case SDL_SCANCODE_LSHIFT:
 221     case SDL_SCANCODE_LALT:
 222     case SDL_SCANCODE_LGUI:
 223     case SDL_SCANCODE_RCTRL:
 224     case SDL_SCANCODE_RSHIFT:
 225     case SDL_SCANCODE_RALT:
 226     case SDL_SCANCODE_RGUI:
 227         if (ev->type == SDL_KEYUP) {
 228             modifiers_state[ev->keysym.scancode] = 0;
 229         } else {
 230             modifiers_state[ev->keysym.scancode] = 1;
 231         }
 232         /* fall though */
 233     default:
 234         qemu_input_event_send_key_qcode(NULL, qcode,
 235                                         ev->type == SDL_KEYDOWN);
 236     }
 237 }
 238
 239 static void sdl_update_caption(struct sdl2_state *scon)
 240 {
 241     char win_title[1024];
 242     char icon_title[1024];
 243     const char *status = "";
 244
 245     if (!runstate_is_running()) {
 246         status = " [Stopped]";
 247     } else if (gui_grab) {
 248         if (alt_grab) {
 249             status = " - Press Ctrl-Alt-Shift to exit mouse grab";
 250         } else if (ctrl_grab) {
 251             status = " - Press Right-Ctrl to exit mouse grab";
 252         } else {
 253             status = " - Press Ctrl-Alt to exit mouse grab";
 254         }
 255     }
 256
 257     if (qemu_name) {
 258         snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 259                  scon->idx, status);
 260         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 261     } else {
 262         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 263         snprintf(icon_title, sizeof(icon_title), "QEMU");
 264     }
 265
 266     if (scon->real_window) {
 267         SDL_SetWindowTitle(scon->real_window, win_title);
 268     }
 269 }
 270
 271 static void sdl_hide_cursor(void)
 272 {
 273     if (!cursor_hide) {
 274         return;
 275     }
 276
 277     if (qemu_input_is_absolute()) {
 278         SDL_ShowCursor(1);
 279         SDL_SetCursor(sdl_cursor_hidden);
 280     } else {
 281         SDL_ShowCursor(0);
 282     }
 283 }
 284
 285 static void sdl_show_cursor(void)
 286 {
 287     if (!cursor_hide) {
 288         return;
 289     }
 290
 291     if (!qemu_input_is_absolute()) {
 292         SDL_ShowCursor(1);
 293         if (guest_cursor &&
 294             (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 295             SDL_SetCursor(guest_sprite);
 296         } else {
 297             SDL_SetCursor(sdl_cursor_normal);
 298         }
 299     }
 300 }
 301
 302 static void sdl_grab_start(struct sdl2_state *scon)
 303 {
 304     /*
 305      * If the application is not active, do not try to enter grab state. This
 306      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 307      * application (SDL bug).
 308      */
 309     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 310         return;
 311     }
 312     if (guest_cursor) {
 313         SDL_SetCursor(guest_sprite);
 314         if (!qemu_input_is_absolute() && !absolute_enabled) {
 315             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 316         }
 317     } else {
 318         sdl_hide_cursor();
 319     }
 320     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 321     gui_grab = 1;
 322     sdl_update_caption(scon);
 323 }
 324
 325 static void sdl_grab_end(struct sdl2_state *scon)
 326 {
 327     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 328     gui_grab = 0;
 329     sdl_show_cursor();
 330     sdl_update_caption(scon);
 331 }
 332
 333 static void absolute_mouse_grab(struct sdl2_state *scon)
 334 {
 335     int mouse_x, mouse_y;
 336     int scr_w, scr_h;
 337     SDL_GetMouseState(&mouse_x, &mouse_y);
 338     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 339     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 340         mouse_y > 0 && mouse_y < scr_h - 1) {
 341         sdl_grab_start(scon);
 342     }
 343 }
 344
 345 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 346 {
 347     if (qemu_input_is_absolute()) {
 348         if (!absolute_enabled) {
 349             absolute_enabled = 1;
 350             absolute_mouse_grab(&sdl2_console[0]);
 351         }
 352     } else if (absolute_enabled) {
 353         if (!gui_fullscreen) {
 354             sdl_grab_end(&sdl2_console[0]);
 355         }
 356         absolute_enabled = 0;
 357     }
 358 }
 359
 360 static void sdl_send_mouse_event(struct sdl2_state *scon, int dx, int dy,
 361                                  int dz, int x, int y, int state)
 362 {
 363     static uint32_t bmap[INPUT_BUTTON_MAX] = {
 364         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 365         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 366         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 367 #if 0
 368         [INPUT_BUTTON_WHEEL_UP]   = SDL_BUTTON(SDL_BUTTON_WHEELUP),
 369         [INPUT_BUTTON_WHEEL_DOWN] = SDL_BUTTON(SDL_BUTTON_WHEELDOWN),
 370 #endif
 371     };
 372     static uint32_t prev_state;
 373
 374     if (prev_state != state) {
 375         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 376         prev_state = state;
 377     }
 378
 379     if (qemu_input_is_absolute()) {
 380         int scr_w, scr_h;
 381         int max_w = 0, max_h = 0;
 382         int off_x = 0, off_y = 0;
 383         int cur_off_x = 0, cur_off_y = 0;
 384         int i;
 385
 386         for (i = 0; i < sdl2_num_outputs; i++) {
 387             struct sdl2_state *thiscon = &sdl2_console[i];
 388             if (thiscon->real_window && thiscon->surface) {
 389                 SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
 390                 cur_off_x = thiscon->x;
 391                 cur_off_y = thiscon->y;
 392                 if (scr_w + cur_off_x > max_w) {
 393                     max_w = scr_w + cur_off_x;
 394                 }
 395                 if (scr_h + cur_off_y > max_h) {
 396                     max_h = scr_h + cur_off_y;
 397                 }
 398                 if (i == scon->idx) {
 399                     off_x = cur_off_x;
 400                     off_y = cur_off_y;
 401                 }
 402             }
 403         }
 404         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
 405         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
 406     } else if (guest_cursor) {
 407         x -= guest_x;
 408         y -= guest_y;
 409         guest_x += x;
 410         guest_y += y;
 411         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, x);
 412         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, y);
 413     }
 414     qemu_input_event_sync();
 415 }
 416
 417 static void sdl_scale(struct sdl2_state *scon, int width, int height)
 418 {
 419     int bpp = 0;
 420     do_sdl_resize(scon, width, height, bpp);
 421     scaling_active = 1;
 422 }
 423
 424 static void toggle_full_screen(struct sdl2_state *scon)
 425 {
 426     int width = surface_width(scon->surface);
 427     int height = surface_height(scon->surface);
 428     int bpp = surface_bits_per_pixel(scon->surface);
 429
 430     gui_fullscreen = !gui_fullscreen;
 431     if (gui_fullscreen) {
 432         SDL_GetWindowSize(scon->real_window,
 433                           &gui_saved_width, &gui_saved_height);
 434         gui_saved_scaling = scaling_active;
 435
 436         do_sdl_resize(scon, width, height, bpp);
 437         scaling_active = 0;
 438
 439         gui_saved_grab = gui_grab;
 440         sdl_grab_start(scon);
 441     } else {
 442         if (gui_saved_scaling) {
 443             sdl_scale(scon, gui_saved_width, gui_saved_height);
 444         } else {
 445             do_sdl_resize(scon, width, height, 0);
 446         }
 447         if (!gui_saved_grab) {
 448             sdl_grab_end(scon);
 449         }
 450     }
 451     graphic_hw_invalidate(scon->dcl.con);
 452     graphic_hw_update(scon->dcl.con);
 453 }
 454
 455 static void handle_keydown(SDL_Event *ev)
 456 {
 457     int mod_state;
 458     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 459
 460     if (alt_grab) {
 461         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 462             (gui_grab_code | KMOD_LSHIFT);
 463     } else if (ctrl_grab) {
 464         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 465     } else {
 466         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 467     }
 468     gui_key_modifier_pressed = mod_state;
 469
 470     if (gui_key_modifier_pressed) {
 471         switch (ev->key.keysym.scancode) {
 472         case SDL_SCANCODE_F:
 473             toggle_full_screen(scon);
 474             gui_keysym = 1;
 475             break;
 476         case SDL_SCANCODE_U:
 477             if (scaling_active) {
 478                 scaling_active = 0;
 479                 sdl_switch(&scon->dcl, NULL);
 480                 graphic_hw_invalidate(scon->dcl.con);
 481                 graphic_hw_update(scon->dcl.con);
 482             }
 483             gui_keysym = 1;
 484             break;
 485         case SDL_SCANCODE_KP_PLUS:
 486         case SDL_SCANCODE_KP_MINUS:
 487             if (!gui_fullscreen) {
 488                 int scr_w, scr_h;
 489                 int width, height;
 490                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 491
 492                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 493                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 494                             160);
 495                 height = (surface_height(scon->surface) * width) /
 496                     surface_width(scon->surface);
 497
 498                 sdl_scale(scon, width, height);
 499                 graphic_hw_invalidate(NULL);
 500                 graphic_hw_update(NULL);
 501                 gui_keysym = 1;
 502             }
 503         default:
 504             break;
 505         }
 506     }
 507     if (!gui_keysym) {
 508         sdl_process_key(&ev->key);
 509     }
 510 }
 511
 512 static void handle_keyup(SDL_Event *ev)
 513 {
 514     int mod_state;
 515     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 516
 517     if (!alt_grab) {
 518         mod_state = (ev->key.keysym.mod & gui_grab_code);
 519     } else {
 520         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 521     }
 522     if (!mod_state && gui_key_modifier_pressed) {
 523         gui_key_modifier_pressed = 0;
 524         if (gui_keysym == 0) {
 525             /* exit/enter grab if pressing Ctrl-Alt */
 526             if (!gui_grab) {
 527                 sdl_grab_start(scon);
 528             } else if (!gui_fullscreen) {
 529                 sdl_grab_end(scon);
 530             }
 531             /* SDL does not send back all the modifiers key, so we must
 532              * correct it. */
 533             reset_keys();
 534             return;
 535         }
 536         gui_keysym = 0;
 537     }
 538     if (!gui_keysym) {
 539         sdl_process_key(&ev->key);
 540     }
 541 }
 542
 543 static void handle_mousemotion(SDL_Event *ev)
 544 {
 545     int max_x, max_y;
 546     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 547
 548     if (qemu_input_is_absolute() || absolute_enabled) {
 549         int scr_w, scr_h;
 550         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 551         max_x = scr_w - 1;
 552         max_y = scr_h - 1;
 553         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 554                          ev->motion.x == max_x || ev->motion.y == max_y)) {
 555             sdl_grab_end(scon);
 556         }
 557         if (!gui_grab &&
 558             (ev->motion.x > 0 && ev->motion.x < max_x &&
 559              ev->motion.y > 0 && ev->motion.y < max_y)) {
 560             sdl_grab_start(scon);
 561         }
 562     }
 563     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 564         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel, 0,
 565                              ev->motion.x, ev->motion.y, ev->motion.state);
 566     }
 567 }
 568
 569 static void handle_mousebutton(SDL_Event *ev)
 570 {
 571     int buttonstate = SDL_GetMouseState(NULL, NULL);
 572     SDL_MouseButtonEvent *bev;
 573     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 574     int dz;
 575
 576     bev = &ev->button;
 577     if (!gui_grab && !qemu_input_is_absolute()) {
 578         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 579             /* start grabbing all events */
 580             sdl_grab_start(scon);
 581         }
 582     } else {
 583         dz = 0;
 584         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 585             buttonstate |= SDL_BUTTON(bev->button);
 586         } else {
 587             buttonstate &= ~SDL_BUTTON(bev->button);
 588         }
 589 #ifdef SDL_BUTTON_WHEELUP
 590         if (bev->button == SDL_BUTTON_WHEELUP &&
 591             ev->type == SDL_MOUSEBUTTONDOWN) {
 592             dz = -1;
 593         } else if (bev->button == SDL_BUTTON_WHEELDOWN &&
 594                    ev->type == SDL_MOUSEBUTTONDOWN) {
 595             dz = 1;
 596         }
 597 #endif
 598         sdl_send_mouse_event(scon, 0, 0, dz, bev->x, bev->y, buttonstate);
 599     }
 600 }
 601
 602 static void handle_windowevent(DisplayChangeListener *dcl, SDL_Event *ev)
 603 {
 604     int w, h;
 605     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 606
 607     switch (ev->window.event) {
 608     case SDL_WINDOWEVENT_RESIZED:
 609         sdl_scale(scon, ev->window.data1, ev->window.data2);
 610         graphic_hw_invalidate(scon->dcl.con);
 611         graphic_hw_update(scon->dcl.con);
 612         break;
 613     case SDL_WINDOWEVENT_EXPOSED:
 614         SDL_GetWindowSize(SDL_GetWindowFromID(ev->window.windowID), &w, &h);
 615         sdl_update(dcl, 0, 0, w, h);
 616         break;
 617     case SDL_WINDOWEVENT_FOCUS_GAINED:
 618     case SDL_WINDOWEVENT_ENTER:
 619         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 620             absolute_mouse_grab(scon);
 621         }
 622         break;
 623     case SDL_WINDOWEVENT_FOCUS_LOST:
 624         if (gui_grab && !gui_fullscreen) {
 625             sdl_grab_end(scon);
 626         }
 627         break;
 628     case SDL_WINDOWEVENT_RESTORED:
 629         update_displaychangelistener(dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 630         break;
 631     case SDL_WINDOWEVENT_MINIMIZED:
 632         update_displaychangelistener(dcl, 500);
 633         break;
 634     case SDL_WINDOWEVENT_CLOSE:
 635         if (!no_quit) {
 636             no_shutdown = 0;
 637             qemu_system_shutdown_request();
 638         }
 639         break;
 640     }
 641 }
 642
 643 static void sdl_refresh(DisplayChangeListener *dcl)
 644 {
 645     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 646     SDL_Event ev1, *ev = &ev1;
 647
 648     if (scon->last_vm_running != runstate_is_running()) {
 649         scon->last_vm_running = runstate_is_running();
 650         sdl_update_caption(scon);
 651     }
 652
 653     graphic_hw_update(dcl->con);
 654
 655     while (SDL_PollEvent(ev)) {
 656         switch (ev->type) {
 657         case SDL_KEYDOWN:
 658             handle_keydown(ev);
 659             break;
 660         case SDL_KEYUP:
 661             handle_keyup(ev);
 662             break;
 663         case SDL_QUIT:
 664             if (!no_quit) {
 665                 no_shutdown = 0;
 666                 qemu_system_shutdown_request();
 667             }
 668             break;
 669         case SDL_MOUSEMOTION:
 670             handle_mousemotion(ev);
 671             break;
 672         case SDL_MOUSEBUTTONDOWN:
 673         case SDL_MOUSEBUTTONUP:
 674             handle_mousebutton(ev);
 675             break;
 676         case SDL_WINDOWEVENT:
 677             handle_windowevent(dcl, ev);
 678             break;
 679         default:
 680             break;
 681         }
 682     }
 683 }
 684
 685 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 686                            int x, int y, int on)
 687 {
 688     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 689     if (on) {
 690         if (!guest_cursor) {
 691             sdl_show_cursor();
 692         }
 693         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 694             SDL_SetCursor(guest_sprite);
 695             if (!qemu_input_is_absolute() && !absolute_enabled) {
 696                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 697             }
 698         }
 699     } else if (gui_grab) {
 700         sdl_hide_cursor();
 701     }
 702     guest_cursor = on;
 703     guest_x = x, guest_y = y;
 704 }
 705
 706 static void sdl_mouse_define(DisplayChangeListener *dcl,
 707                              QEMUCursor *c)
 708 {
 709
 710     if (guest_sprite) {
 711         SDL_FreeCursor(guest_sprite);
 712     }
 713
 714     if (guest_sprite_surface) {
 715         SDL_FreeSurface(guest_sprite_surface);
 716     }
 717
 718     guest_sprite_surface =
 719         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 720                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 721
 722     if (!guest_sprite_surface) {
 723         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 724         return;
 725     }
 726     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 727                                          c->hot_x, c->hot_y);
 728     if (!guest_sprite) {
 729         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 730         return;
 731     }
 732     if (guest_cursor &&
 733         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 734         SDL_SetCursor(guest_sprite);
 735     }
 736 }
 737
 738 static void sdl_cleanup(void)
 739 {
 740     if (guest_sprite) {
 741         SDL_FreeCursor(guest_sprite);
 742     }
 743     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 744 }
 745
 746 static const DisplayChangeListenerOps dcl_ops = {
 747     .dpy_name          = "sdl",
 748     .dpy_gfx_update    = sdl_update,
 749     .dpy_gfx_switch    = sdl_switch,
 750     .dpy_refresh       = sdl_refresh,
 751     .dpy_mouse_set     = sdl_mouse_warp,
 752     .dpy_cursor_define = sdl_mouse_define,
 753 };
 754
 755 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 756 {
 757     int flags;
 758     uint8_t data = 0;
 759     char *filename;
 760     int i;
 761
 762     if (no_frame) {
 763         gui_noframe = 1;
 764     }
 765
 766 #ifdef __linux__
 767     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 768      * accessible $DISPLAY to open X11 window.  This is often the case
 769      * when qemu is run using sudo.  But in this case, and when actually
 770      * run in X11 environment, SDL fights with X11 for the video card,
 771      * making current display unavailable, often until reboot.
 772      * So make x11 the default SDL video driver if this variable is unset.
 773      * This is a bit hackish but saves us from bigger problem.
 774      * Maybe it's a good idea to fix this in SDL instead.
 775      */
 776     setenv("SDL_VIDEODRIVER", "x11", 0);
 777 #endif
 778
 779     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 780     if (SDL_Init(flags)) {
 781         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 782                 SDL_GetError());
 783         exit(1);
 784     }
 785
 786     for (i = 0;; i++) {
 787         QemuConsole *con = qemu_console_lookup_by_index(i);
 788         if (!con || !qemu_console_is_graphic(con)) {
 789             break;
 790         }
 791     }
 792     sdl2_num_outputs = i;
 793     sdl2_console = g_new0(struct sdl2_state, sdl2_num_outputs);
 794     for (i = 0; i < sdl2_num_outputs; i++) {
 795         QemuConsole *con = qemu_console_lookup_by_index(i);
 796         sdl2_console[i].dcl.ops = &dcl_ops;
 797         sdl2_console[i].dcl.con = con;
 798         register_displaychangelistener(&sdl2_console[i].dcl);
 799         sdl2_console[i].idx = i;
 800     }
 801
 802     /* Load a 32x32x4 image. White pixels are transparent. */
 803     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 804     if (filename) {
 805         SDL_Surface *image = SDL_LoadBMP(filename);
 806         if (image) {
 807             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 808             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 809             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 810         }
 811         g_free(filename);
 812     }
 813
 814     if (full_screen) {
 815         gui_fullscreen = 1;
 816         sdl_grab_start(0);
 817     }
 818
 819     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 820     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 821
 822     gui_grab = 0;
 823
 824     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 825     sdl_cursor_normal = SDL_GetCursor();
 826
 827     atexit(sdl_cleanup);
 828 }
 829 #endif